1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
|
package image
import (
"strings"
"github.com/containers/image/docker/reference"
"github.com/pkg/errors"
)
// imageParts describes the parts of an image's name
type imageParts struct {
unnormalizedRef reference.Named // WARNING: Did not go through docker.io[/library] normalization
hasRegistry bool
}
// Registries must contain a ":" or a "." or be localhost; this helper exists for users of reference.Parse.
// For inputs that should use the docker.io[/library] normalization, use reference.ParseNormalizedNamed instead.
func isRegistry(name string) bool {
return strings.ContainsAny(name, ".:") || name == "localhost"
}
// GetImageBaseName uses decompose and string splits to obtain the base
// name of an image. Doing this here because it beats changing the
// imageParts struct names to be exported as well.
func GetImageBaseName(input string) (string, error) {
decomposedImage, err := decompose(input)
if err != nil {
return "", err
}
splitImageName := strings.Split(decomposedImage.unnormalizedRef.Name(), "/")
return splitImageName[len(splitImageName)-1], nil
}
// decompose breaks an input name into an imageParts description
func decompose(input string) (imageParts, error) {
imgRef, err := reference.Parse(input)
if err != nil {
return imageParts{}, err
}
unnormalizedNamed := imgRef.(reference.Named)
// ip.unnormalizedRef, because it uses reference.Parse and not reference.ParseNormalizedNamed,
// does not use the standard heuristics for domains vs. namespaces/repos, so we need to check
// explicitly.
hasRegistry := isRegistry(reference.Domain(unnormalizedNamed))
return imageParts{
unnormalizedRef: unnormalizedNamed,
hasRegistry: hasRegistry,
}, nil
}
// suspiciousRefNameTagValuesForSearch returns a "tag" value used in a previous implementation.
// This exists only to preserve existing behavior in heuristic code; it’s dubious that that behavior is correct,
// gespecially for the tag value.
func (ip *imageParts) suspiciousRefNameTagValuesForSearch() (string, string, string) {
registry := reference.Domain(ip.unnormalizedRef)
imageName := reference.Path(ip.unnormalizedRef)
// ip.unnormalizedRef, because it uses reference.Parse and not reference.ParseNormalizedNamed,
// does not use the standard heuristics for domains vs. namespaces/repos.
if registry != "" && !isRegistry(registry) {
imageName = registry + "/" + imageName
registry = ""
}
var tag string
if tagged, isTagged := ip.unnormalizedRef.(reference.NamedTagged); isTagged {
tag = tagged.Tag()
} else if _, hasDigest := ip.unnormalizedRef.(reference.Digested); hasDigest {
tag = "none"
} else {
tag = "latest"
}
return registry, imageName, tag
}
// referenceWithRegistry returns a (normalized) reference.Named composed of ip (with !ip.hasRegistry)
// qualified with registry.
func (ip *imageParts) referenceWithRegistry(registry string) (reference.Named, error) {
if ip.hasRegistry {
return nil, errors.Errorf("internal error: referenceWithRegistry called on imageParts with a registry (%#v)", *ip)
}
// We could build a reference.WithName+WithTag/WithDigest here, but we need to round-trip via a string
// and a ParseNormalizedNamed anyway to get the right normalization of docker.io/library, so
// just use a string directly.
qualified := registry + "/" + ip.unnormalizedRef.String()
ref, err := reference.ParseNormalizedNamed(qualified)
if err != nil {
return nil, errors.Wrapf(err, "error normalizing registry+unqualified reference %#v", qualified)
}
return ref, nil
}
// normalizedReference returns a (normalized) reference for ip (with ip.hasRegistry)
func (ip *imageParts) normalizedReference() (reference.Named, error) {
if !ip.hasRegistry {
return nil, errors.Errorf("internal error: normalizedReference called on imageParts without a registry (%#v)", *ip)
}
// We need to round-trip via a string to get the right normalization of docker.io/library
s := ip.unnormalizedRef.String()
ref, err := reference.ParseNormalizedNamed(s)
if err != nil { // Should never happen
return nil, errors.Wrapf(err, "error normalizing qualified reference %#v", s)
}
return ref, nil
}
|
